PDF Encrypt is software that enables users to protect their existing PDF files by encrypting them with standard 40-bit or 128-bit or AES encryption. The software has features for setting permissions, adding user and owner passwords.

If you're looking to encrypt a PDF without allowing it to be printed, this program allows you to do this. The button to print the file will be disabled in Acrobat Reader application. You can also encrypt a PDF that enables the user to read it only if they know the correct password. It's important to note that the source PDF file must be unencrypted. If the PDF is encrypted, Acrobat Reader will show a key in the bottom status bar.
This program allows you to apply two passwords to a PDF. The first password is the owner password. When you open a PDF with an owner password, you'll be given full access to the PDF when a user password is assigned. This means that even if printing is disabled, you can still print the PDF with this password. If you secure the PDF with just an owner password, no password prompt will appear when you open the PDF.
The second password is the user password. When you open a PDF with a user password, you'll be restricted based on how the PDF was password protected. For instance, printing may be disabled. All in all, PDF Encrypt software is an excellent tool if you're looking to encode your PDFs and set the correct permissions for viewing and printing.
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